Carbide End Mill

EC40A High Hardness End Mills

Carbide high speed end mills

Ultrafine-grain carbide

The EC40A series end mills combine strength and superior performance. These square profile end mills are designed to extend tool life in stainless steel, high-temperature alloys, and hardened steels up to 65 Rc. Advanced grinding and manufacturing processes ensure cutting stability, and an eccentric removal design maximizes edge strength in both roughing and finishing applications. Developed for aerospace precision parts, the EC40A end mill features eccentric removal for maximum edge strength and an Aplus coating for enhanced performance in hard materials, making it an excellent choice for a wide range of applications.

Part number EC40600A
Material Ultrafine particle tungsten carbide alloy
Product Name 4-flute tungsten carbide end mill- 38º
OEM / ODM Made to your samples or drawings
Specifications Ø6.0 × 20L × Ø6.0 × 3X
Packaging (mm) 12.5 × 12.5 × 69L
Blade Diameter D Ø6.0mm
Blade Length H 12.0mm
Shank diameter d Ø6.0mm
Overall Length L 50.0mm
Coating APLUS
MOQ 2 pcs
Lead time 1 week
Origin Shenzhen, China
Our engineering team replies within 24 hours

Engineering Features

Design details engineered for accuracy, tool life and process stability.

50° Large Helix Angle

Enables ultra-smooth progressive cutting, significantly reducing cutting resistance and vibration. Surface finish can reach below Ra0.4μm, suitable for precision machining of high-hardness materials.

Nano Blue Coating (TiAlN)

Surface hardness HV3400, high temperature resistance up to 1400°C, maintains excellent wear resistance even under high-speed cutting, reducing the risk of coating peeling.

Ultra-fine Grain Carbide Substrate

Substrate hardness up to HRC67, combining high hardness and toughness, tool life is 2-3 times that of ordinary end mills.

High-Hardness Edge Strengthening

The cutting edge undergoes special passivation treatment, able to withstand the cutting impact of high-hardness materials, with 40% higher resistance to chipping than ordinary end mills.

Low-friction coating surface

With a friction coefficient of only 0.25, it effectively suppresses built-up edge formation and ensures stable surface quality for machining high-hardness materials.

Provides excellent performance and high-temperature resistance in various ferrous metals, including low-alloy and medium-alloy steels, tool steels, and cast iron.

The eccentric chip removal design achieves maximum edge strength in both roughing and finishing applications.

Request a Quote

Need EC40A in your size?

Send your workpiece material and cutter dimensions. We supply standard end mills and special milling cutters made to your samples or drawings.

  • 1Upload your drawing or describe the part
  • 2Our engineers review it and reply within 24 hours
  • 3Receive a quotation with tool design and lead time

Include in your request

  • Workpiece material and hardness
  • Cutter diameter, flute length and overall length
  • Corner radius / profile
  • Machine type and coolant
  • Quantity
  • Drawing: PDF, DWG, DXF or STEP

Request a Quote for EC40A